PREMIUM QUALITY AMERICAN-MADE CUTTING TOOLS Technical Information
END MILLS - CARBIDE
GENERAL RECOMMENDATIONS All speed and feed recommendations should be considered only as a starting point. The suggested speed & feed values are recommended for uncoated tools only. When various coatings are applied, SFM may be increased accordingly. These general percentages are as follows under optimal condi- tions: TICN = +25% ZRN = +30% ALTIN = +40% RIGIDITY Maximize rigidity to reduce chatter and increase tool life. Ways to improve rigidity include choosing the largest diameter possible to perform your milling task, use the shortest LOC (Length of Cut) available, and always use the tool holder which offers the shortest gage line (Shortest Tool Holder Length). CHATTER If chatter is present increase feed or reduce speed.
Speed and Feed Calculations:
RPM = (3.82 x SFM) ÷ Dia. IPR = IPM ÷ RPM SFM = (RPM x Dia.) ÷ 3.82
IPM = IPT(chip load) x No. of Teeth x RPM IPT(chip load) = IPM ÷ (No. of teeth x RPM)
BURS - CARBIDE
SELECTION BY CUT SINGLE CUT : • Provides the best surface finish and largest contact patch on the work piece. • Demands greater operator skill since the single flute direction pulls the bur into the work piece. DOUBLE CUT : • Most popular geometry as the dual flute direction reduces the contact patch on the work piece and therefore provides easier operator control while still maintaining a good surface finish. ALUMINUM CUT : • These burs employ a coarser flute which results in improved cutting performance for aluminum and aluminum alloys.
CARBIDE BURS - SPEEDS
CUTTING DIA.
SUGGESTED RPM MAXIMUM RPM
1/16 1/8 3/16 1/4 5/16 3/8 7/16
55,000 – 85,000 35,000 – 65,000 30,000 – 55,000 25,000 – 50,000 20,000 – 40,000 18,000 – 40,000 16,000 – 38,000 14,000 – 36,000 12,000 – 25,000 10,000 – 20,000 7,500 – 20,000
90,000 80,000 70,000 70,000 67,000 63,000 58,000 50,000 40,000 33,000 25,000
1/2 5/8 3/4 1
When using double cut: Reduce speeds by 25% approximately. For stainless steel material: Increase speeds by 50% approximately.
MADE IN THE USA
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